/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineGroupsInterface.h
Get the cached list of users requesting to becoming members of a group. If the information is not cached locally, call QueryGroupRequests to request it from the server.
Shared pointer to the cached roster structure if one exists
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< const [IGroupRequests](API\Plugins\OnlineSubsystem\Interfaces\IGroupRequests) > GetCachedGroupRequests ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & ContextUserId, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & GroupId )